Desktop/hand-held trackball



FIG. 1 is a perspective view of a desktop/hand-held trackball according to my new design;

FIG. 2 is a right side elevational view thereof;

The left side is a mirror image of the right side;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a top plan view thereof.

The bottom is flat and unornamented. 

The ornamental design for a desktop/hand-held tackball, as shown and described. 